[clarita]

Normal by who's standards?
If a bulb is thinning and shriveling this is a strong indication of improper watering habits at some stage. I find that especially true of the new world species. If they don't have to work a little for their water then they don't store it.... Reliable source bulbs thin down

If you recall a previous discussion, the same principle is working with Ida locusta. The bulbs do not elongate. She is not being watered in the same way as she was...ida's PB's plumps out, rather than elongate (That and light source is not quite the same)

Looks to me as if the cultivar may have overwatered during dry season which isn't uncommon. This may compromise the plant in the future, time will tell